DocumentCode :
2642829
Title :
Capability of asymmetrical grid faults ride-through for DFIG-based Wind turbines
Author :
Zheng, Zhong ; Yang, Geng ; Geng, Hua
Author_Institution :
Dept. of Autom., Tsinghua Univ., Beijing, China
fYear :
2012
fDate :
25-28 Oct. 2012
Firstpage :
3533
Lastpage :
3540
Abstract :
In order to meet the grid codes and ensure safe operation of doubly-fed induction generator (DFIG) based wind energy conversion system (WECS) during asymmetrical grid faults, firstly, this paper designs low voltage ride-through (LVRT) control schemes for the back-to-back converters of DFIG-based WECS. Then, due to the converter capacity constraint, the controllable regions of DFIG during asymmetrical grid faults are analyzed by optimal method while the asymmetrical LVRT limitation of DFIG is given, which points out that DFIG-based WECS can achieve LVRT only under mild asymmetrical fault situations. At the last, a typical simulated system of a 9 MW DFIG-based wind farm connected into power system is used for case study. The simulation results validate the accuracy of the analysis for the asymmetrical LVRT capability of DFIG-based WECS.
Keywords :
asynchronous generators; power convertors; power generation control; power generation faults; power grids; wind turbines; DFIG; WECS; asymmetrical LVRT capability; asymmetrical grid faults; converter capacity constraint; doubly-fed induction generator; grid codes; low voltage ride-through control; power 9 MW; wind energy conversion system; wind farm; wind turbines; Wind energy conversion system (WECS); asymmetrical grid faults; doubly-fed induction generator (DFIG); limit analysis; low voltage ride-through (LVRT); optimal method;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
IECON 2012 - 38th Annual Conference on IEEE Industrial Electronics Society
Conference_Location :
Montreal, QC
ISSN :
1553-572X
Print_ISBN :
978-1-4673-2419-9
Electronic_ISBN :
1553-572X
Type :
conf
DOI :
10.1109/IECON.2012.6389331
Filename :
6389331
Link To Document :
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